Female Binding Barrel, Finish Zinc-Plated, Material Steel, Barrel Head Style Truss, Barrel Drive Type Internal Hex, Thread Size 1/4 In. -20, Barrel Length 17 mm, Barrel Diameter 9 mm, Barrel Thread Depth 13 mm, Screw Length Not Applicable, Barrel Drive Size 5 mm, Barrel Head Diameter 17 mm, Barrel Head Height 2 mm, Grip Size 17 mm, Made in North America Not Made in North America, Pack Size Small, Package Quantity 10. This item has been restricted from sale in the following state (s): []